Remove 1000-sat Lightning invoice paywalls from LNBits, LNPay, and
OpenNode API integrations. All three now go directly to config setup
(same flow as TippinMe/TallyCoin which were already free).
Changes:
- Replace aaccPPiLNBits/LNPay/OpenNode() payment loops with direct
config-or-setup logic in both PyBlock.py and SPV/spvblock.py
- Change all menu labels from PAID/PREMIUM/LOCKED to FREE
- Remove LNURL file existence checks (lnbitSN.conf gates)
- Remove ~400 lines of payment invoice generation, QR display,
and payment polling code
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>